PROJ00040

• Contract/PO #: C153446
• Contractor Name: Grand Mesa Water Conservancy District
• Contract Type: Grant
• Water District: 0
• County: Delta
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Feasibility Study

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Average annual runoff available to the portion of Tongue Creek basin under study,
based on the 1941-1984 data described in the preceding paragraph, amounts to
63,000 acre-feet. In years of low flow, the average runoff amounts to 43,200 acre-
feet, In years of normal flow, 63,200 acre-feet; and in years of high flow, 88,liOO
acre-feet.

The following tabulation shows the disaggregation of total annual runoff into
average monthly runoff in all years and in years classified as having low, normal
and high streamflow,

AVERAGE MONTHLY RUNOFF IN TONGUE CREEK BASIN
0,000 Acre-Feet)
Month All Years Low Normal High
November 1.3 1.0 1.2 1.7
December 0,9 0,8 0,8 1.3
January 0,9 0.7 0,8 1.1
February 0,8 0,6 0.7 1.0
March 1.1 0.9 1.1 1.3
April li.O 3.3 li,8 li.3
May lli .1 9,3 13,li 21.0
June 15,1 8.0 lli,2 25,0
July 9.5 6,8 10,1 12.6
August 7.8 5.9 8.5 9,6
September 5.1 3,g 5.li 6,li
October 2.5 2,0 2,3 3,2
Total 63.0 li3,2 63,2 gg,li

A verage annual runoff in the entire Tongue Creek basin is 63,000 acre-feet, as
indicated in the foregoing. The following tabulation shows the average annual
runoff of six tributary streams within the basin.

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